CAIE IGCSE Physics 4.5.1.1 A Conductor Moving Across a Magnetic Questions

Learn how changing magnetic flux induces e.m.f. and current, while no field-line cutting gives no induction.

Exam points

explain why a moving magnet or coil gives galvanometer deflection
state that no e.m.f. is induced without cutting magnetic field lines
link changing magnetic field in a solenoid to induced current or voltage

[Maximum number: 4]

Fig. 9.1 shows a magnet on the end of a spring and a coil of wire connected to a sensitive centre-zero galvanometer. The magnet can move freely through the coil.

Fig. 9.1

The magnet is pulled down and released.

Describe and explain what happens to the needle of the sensitive galvanometer.

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CAIE IGCSE Physics 4.5.1.1 A Conductor Moving Across a Magnetic Questions question 1